2024-2026 Audi Various Warning Lamps in Instrument Cluster TSB

Audi has released Technical Service Bulletin (TSB) 2077819/1, effective May 12, 2025, to address an issue where various warning lamps illuminate in the instrument cluster of certain 2024-2026 Audi models. This TSB outlines a software update for the data bus diagnostic interface (J533, diagnostic address 0019) to correct the underlying problem.

Symptoms

Owners of affected Audi vehicles may observe various warning lamps appearing in the instrument cluster, either after starting the vehicle or while driving. These messages are displayed in the driver information system and can include:

• "transmission malfunction display"
• "driver assistance malfunction display"
• "engine start malfunction indicator"
• "interference display for emergency call service"
• "shock absorber control system malfunction display"
• "ABS malfunction display"
• "power steering malfunction display"

Specific verbatim warnings reported by customers include "Vehicle lights: fault.", "Emergency call function: fault.", "Start/stop system: fault.", and "Stabilization control (ESC): fault.". In some cases, the side windows may also lower automatically when these various warning lamps are active.

Diagnosis / Trigger Conditions

During diagnosis, technicians may find various intermittent Diagnostic Trouble Code (DTC) entries logged on different bus systems, specifically in diagnostic address 0019. These entries, along with the warning messages, point to a temporary failure of the gateway J533. While specific fault codes are not provided in the TSB, the presence of these logged entries and the identical time stamp in the event memory are key indicators. The issue often involves communication, single-wire, or signal faults (e.g., implausible signal, CAN single wire mode, no communication, or function limitation due to a missing message). The complaint of various warning lamps cannot always be reproduced in the workshop, and all vehicle systems may continue to function without restrictions despite the warnings.

Technical Background

Audi has identified that an online data campaign may sporadically cause the data bus diagnostic interface (J533) to reset. Although this campaign concluded in week 38/2024, some individual vehicles continue to exhibit the complaint of various warning lamps. The data bus diagnostic interface can become stuck for approximately 30 seconds before automatically resetting itself.

Repair Procedure Summary

To resolve the issue of various warning lamps, a software update for the diagnostic interface control unit (DA0019) is required. The update involves flashing the Data Bus On Board Diagnostic interface (J533, diagnostic address 0019) using the SVM action code with an ODIS tester. Technicians must use the "Flash" mode and the "Authorized Multiple Code Entry" function in ODIS software (available as of April 16, 2025).

The specific SVM code to be entered exactly as written, including commas and without spaces, is ZGDOIP,19A029A,19A029B. The vehicle will use acoustic signals and flashing lights to indicate when user input is needed during the update process. After the update, the diagnostic connector and charger must be unplugged, the engine started and run for one minute, and then the vehicle locked for five minutes. This allows for the diagnostic procedure to be completed and any event memory entries created during the flashing process to be deleted.

Required Tools or Parts

This repair primarily involves a software update to SW 0043 for the diagnostic interface control unit (DA0019). The process requires the use of an ODIS tester and adherence to instructions in TSB 2011732: "00 Software Version Management (SVM), operating instructions."

Important Warnings

Owners and technicians should be aware of several critical warnings:

• High-Voltage Battery Safety: For vehicles with high-voltage components, the high-voltage charging cable must be unplugged BEFORE the SVM code is entered to prevent the battery from charging during the software update. Charging the high-voltage battery during a software update can cause damage to the high-voltage components.
• Warranty Coverage: If your vehicle is outside of its warranty period, this Technical Service Bulletin is for informational purposes only, and repair costs may not be covered.
• Aftermarket Modifications: Damage to control units resulting from chip tuning or other third-party modifications is not covered under warranty. If a customer declines the software update, they should be informed that this could lead to further issues or restrictions with vehicle use or individual components. Any such refusal should be noted on the repair order.

Owner Action

If your 2024-2026 Audi is experiencing various warning lamps in the instrument cluster as described, it is recommended to schedule an appointment with an authorized Audi dealership. The dealership will perform the necessary software update for the data bus diagnostic interface (J533, diagnostic address 0019) under TSB 2077819/1. This update is typically covered under warranty if your vehicle is within the warranty period.

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Source: NHTSA ID: 11018993